Or, if your project doesn't use Cabal, then there is limited support
for using an overall module from your program/library:

SourceGraph path/to/Foo.hs

Note that the Cabal method is preferred, as it is better able to
determine the project name and exported modules (when passing a
Haskell file to SourceGraph, it uses that module's name as the overall
name of project and assumes that it is the only exported module; as
such, it works better for programs than libraries).

Whichever way you run SourceGraph, it then creates a SourceGraph
subdirectory in the same directory as the file that was passed to it,
and within that subdirectory creates the analysis report in
Foo.html.

SourceGraph is still experimental in terms of its ability to parse and
properly understand Haskell source code and in the types of analyses
it performs.